Ion trap



Dec. 22, 1953 G. .1. MUCHER ION TRAP Filed Sept. 26, 1950 INVENTOR.

660%? f Mar/WI Y Patented Dec. 22, 1953 ION TRAP George J. Mucher, Rochester, N. 11., asslxnor to Clarostat Mfg. 00., Inc., Dover, N. 11., a corporation of New York Application September 26, 1950, Serial No. 186,863

16 Claims.

This invention relates to a structurally and functionally improved ion trap primarily intended for application to a cathode ray tube.

It is an object of the invention to furnish a unit of this character which readily be manufactured by economical and quantity production methods and Without the use of highly skilled labor. Accordingly, large quantities may be quickly produced and sold at relatively nominal figures.

A further objectis that of furnishing an ion trap which may readily be applied to the neck or mounting portion of a tube and adjusted to the characteristics of that unit by shifting the position of the trap with respect to the tube body so that the most desirable results are achieved. When so adjusted the unit will remain in position against all probability of accidental displacement.

With these and other objects in mind reference is had to the attached sheet of drawings illustrating one practical embodiment of the invention and in which:

Fig. 1 is a fragmentary side elevation of a tube portion with an ion trap mounted thereon;

Fig. 2 is a side view of the trap and looking towards the end of the tube;

Fig. 3 is a sectional View taken along the lines 3-3 and in the direction of the arrows as indicated in Fig. 1;

Fig. 4 is a transverse sectional view taken along the lines 4-4 and in the direction of the arrows as indicated in Fig. 3; and

Fig. 5 is a bottom plan view of the unit.

As in Figs. 1 and 2 the numeral It indicates the neck portion of a tube of the cathode-ray or television type. The numeral H designates the base of the same. These parts may embody one of several different outlines according to the type of tube which is involved. Correspondingly the parts of the trap may be modified to conform to the contours of the tube portion upon which it is to be mounted. Therefore, while in the present showing, the neck portion of the tube has been shown as a relativelv constricted cylinder, it will be understood that this is for the purpose of illustration and accordingly is not to be construed in a limiting sense.

Referring to the trap, it includes a bracket or tube-embracing portion preferably comprising a pair of arms which have their bodies extending in the form of arcs as indicated at 12. The curvature involved at this point may correspond generally to the exterior curvature of the tube face. These arms are each provided with outwardly extending portions [3 terminating in inwardly extending tongues M. A block or unit 15 of magnetic material is interposed between the portions l3 of the two arms. Portions 13 are in face to face contact with the outer surfaces of this magnet. Tongues l4 underlie the same. The arms of the brackets being formed of suitable metal, it follows that with the parts disposed in these positions the arms will, in effect, provide portions of the magnet and extend in proper position with respect to the several parts or elements of the tube l0 so that they may function to bend the beam of the latter.

In order to maintain the parts of the assembly in proper positions with respect to each other, a resilient or constricting means may encircle the portions I3 of the arms and press them into contact with the adjacent faces of the magnet. While various forms of structure might be employed to achieve this result, it is preferred, according to the teachings of the present invention, to utilize a cup formed of rubber. As shown, this cup includes a hollow body (6 formed with a reduced opening I! in its base. The width of that opening should be such as to accommodate the tongues H. The side walls of the cup body, as shown in Fig. 4, extend upwardly well above the plane of the magnet IS. The end walls are preferably flared outwardly as indicated at [8 so as to conform to the arcuate outer faces of the arm portlons I2. It is apparent with the arms properly assembled with respect to the magnet body that the cup may be stretched so that the parts may be disposed in the manner shown in Figs. 3 and 4. Thereupon, by releasing the tension or expanding force on the cup, the surfaces of the latter will bear intimately against the adjacent surfaces of the magnet and arms. Thus, the parts will be retained against displacement. However, the arms may be swung within limits so as to de line a smaller or larger enclosure.

While these arms may thus be manipulated according to any desired technique, it is again preferred in accordance with the present teachings that manipulating portions be associated with such arms so that an operator may readily swing tions 20. As shown the reduced portion 19 of one arm is disposed toward one side of the unit while the reduced portion of the second arm is disposed to the opposite side of the unit. Thus, with these portions overlapped, they clear each other.

As will be apparent with the parts assembled and constructed in the manner as aforedescribed, an operator may press the two manipulating portions 26 towards each other. These angularly offset parts will be readily engageable by the operator's fingers and when so shifted will cause arms 12 to be rocked outwardly with respect to each other. Under these circumstances the unit may readily be passed over the .base H onto the neck if) of the tube. Likewise it may be turned with respect to the tube axis and shifted longitudinally of the same. However, when once released, portions 20 will separate to a maximum extent and the arcuate faces 12 will engage with the outer curved surfaces of the tube. Simultaneously and as shown especially in Fig. 2, the tube surface will engage with the edge of the cup. The latter may be developed in the form of an arc 2i to assure a maximum contact zone in this connection. Due to the fact that the cup is preferably formed of rubber or similar material, it follows that the unit will frictionally engage the tube surfaces in a manner such that no probability of accidental shifting of the parts will exist.

Thus, among others, the several objects of the invention as specifically aforenoted are achieved. Obviously numerous changes in construction and rearrangement of the parts might be resorted to without departing from the spirit of the invention as defined by the claims.

I claim:

1. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a body of magnetic material, an arm of metal permeable to magnetic flux disposed adjacent said body and resilient means encircling said body and portions of said arm for urging and maintaining said arm in contact with said body.

2. An ion trap to be applied to the outer neck surface of a cathode ray tubeand including in combination a body of magnetic material, a pair of arm of metal permeable to magnetic flux having portions disposed adjacent opposite ends of said body, tube contacting parts forming portions of said arms and beyond said body and means encircling said body and the adjacent arm portions for urging and yieldingly maintaining said arms in engagement with said body.

3. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a body of magnetic material, a pair of arms of metal permeable to magnetic flux having portions disposed adjacent opposite ends of said body, tube contacting parts forming portions of said arms and beyond said body, means encircling said body and the adjacent arm portions for urging and yieldingly maintaining said arms in engagement with said body and parts of said arms engaging different surfaces of said body to prevent displacement of said arms with respect to the same.

a cup of resilient material receiving said body and the arm portions adjacent the same to yieldingly maintain the latter in contact with said body.

5. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a body of magnetic material, a pair of arms of metal permeable to magnetic flux hav ing portions disposed adjacent opposite ends of said body, tube contacting parts forming portions of said arms and beyond said body, a cup of resilient material receiving said body and the arm portions adjacent the same to yieldingly maintain the latter in contact with said body, angularly offset end portions forming parts of said arms and engaging faces of said body to prevent shifting of the arms with respect to the latter'and said cup being formed with an opening in line with the latter portions.

6. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a magnet, arm of metal permeable to magnetic flux extending therefrom, a cup of resilient material for yieldingly maintaining said arms in proper positions with respect to said magnet and portions of said cup extending beyond said magnet and arms to provide tube-em gaging portions.

7. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a magnet. arms of metal permeable to magnetic flux extending therefrom, a cup of resilient material for yieldingly maintaining said arms in proper positions with respect to said magnet and edge portions of said cup extending in arcuate directions to provide tube-engaging surfaces.

8. An' ion trap to be applied to the outer neck surface of a cathode ray tube including in combination a body of magnetic material, arms of metal permeable to magnetic flux including curved portions and outwardly extending portions, said latter portions being disposed in face to face contact with the body of said magnet, a cup of resilient material receiving said magnet body and the latter arm portions to prevent displacement of the parts with respect to each other and parts of said cup extending beyond magnet body and the last named arm portions.

9. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a body of magnetic mater al, of metal permeable to magnetic flux including curved portions and outwardly extending portions, said latter portions being disposed in face to face contact with the body or" magnet, a cup of resilient material eoeiving magnet body and the latter arm portions to prevent placement of the parts wit respect to each other and parts of said cup extending beyond d magnet body and the last named portions and being outwardly flared to correspond to the curved arm portions.

10. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a body of magnetic material, of metal permeable to magnetic flux including curved portions and outwardly extending cortions, said latter portions being disposed in face to face contact with the body of said a cup of resilient material receiving saic magnet body and the latter arm portions to prevent displacement of the parts with respect to each other, parts of said cup extending beyond said magnet body and the last named arm portions and the 5 outer ends of said arms being overlapped to provide arm-manipulating portions and spaced from each other.

11. In an ion trap of the type to be applied to the outer neck surface of a cathode ray tube, as a sub-combination an arm of metal permeable to magnetic flux to be associated with a permanent magnet, said arm including a curved portion to extend around the surface of a tube neck, an angularly extending inner end part to be applied to a face of said magnet, a portion of reduced width adjacent the outer arm end and an actuating portion at the outer end of said portion.

12. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a magnet body, a pair of tubeembracing arms of metal permeable to magnetic flux applied to opposite faces of said body and resilient means encircling said arms and body to urge and maintain the former in face to face contact with the latter.

13. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a. magnet body, a pair of tube-em bracing arms of metal permeable to magnetic flux applied to opposite faces of said body, resilient means encircling said arms and body to urge and maintain the former in face to face contact with the latter, the ends of said arm:

which extends away from said body being reduced in width and overlapped whereby their extreme end portions are spaced from each other.

14. An ion trap to be applied to the outer neck surface of a cathode ray tube and including in combination a magnet body, a pair of tube-embracing arms of metal permeable to magnetic flux applied to opposite faces of said body and a band of resilient di-electric material encircling said arms in line with said body to urge and maintain the former into face to face contact with the latter.

15. In an ion trap as a sub-combination a cupshaped body of resilient material to envelope a magnet unit and base portions of arms embraced in a magnetic assembly, the base of said body supporting the unit and the inner face of said cup presenting surfaces to bear against the outer face of said arms and yieldingly urge the same toward said unit.

16. In an ion trap as a sub-combination a cupshaped body of resilient material to envelope a magnet unit and base portions of arcuatelyshaped arms embraced in a magnetic assembly, the base of said body supporting the unit, portions of said cup adjacent its rear edge being flared outwardly and the inner face of said cup having surfaces co-extensive with the flared portions to provide in conjunction with the latter supports bearing against the arms of the assembly to yieldingly maintain said arms in predetermined positions and with their base portions in contact with the magnetic unit.

GEORGE J. MUCHER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,266,717 Von Borries et al. Dec. 16, 1941 2,455,676 Hillier Dec. 7, 1948 2,500,455 Fisher Mar. 14, 1950 2,513,929 Gethmann July 4, 1950 2,522,872 Heppner Sept. 19, 1950 2,533,689 Quam Dec, 12, 1950 2,539,156 Ostreicher Jan. 23, 1951 2,542,924 Heppner Feb. 20, 1951 FOREIGN PATENTS Number Country Date 530,914 Great Britain Dec. 24, 1940 

